Answer:
If you are in the 10th grade of the Indian education system, that'll mean that you are about 15 years old. In India, children of about 14 - 15 years of age usually enter 10th grade. In UK, this will be known as the Sophomore year / Year 11 → kids of age 15 - 16 years.
Hope it helps ⚜
Answer:
C. Survival is not often a struggle for most animals.
Explanation:
Animals in their habitat need to struggle for resources because of the competition and danger around. The competition among animals for their survival is a real struggle as their are finite resources in nature and it causes struggle for existence among individuals.
But some animals are blessed with unique senses that helps animals to survive despite the obstacles and dangers they face. <u>For example: some animals have camouflage pattern that helps the animals to blend in with its surroundings and predators are unable to recognize the prey, it protects them from predators.</u>
Hence, special senses in animals make the survival of some animals easy and not often a struggle and the correct answer is "C."
Answer: PE = 800j, KE = 800J
Explanation:
To calculate the potential energy, we use the formula
Potential Energy = Mgh
M = 20kg, g = 10m/sˆ2 , h = 4m
=20 × 10 × 4
=800J
At the maximum height S = 4 and the initial velocity u = 0 The acceleration g = 10m/sˆ2
Using the third equation of motion
vˆ2 = uˆ2 + 2as
= 0ˆ2 + 2 × 10 × 4
vˆ2 = 80
Kinetic Energy (KE) is given by
KE = ½ mvˆ2
= ½ × 20 × 80
=800J